eeg filter design

[rashidahmad484]

AOA;

Hi friends i m doing project on eeg signal acquisition in order to detect drowsy state of driver in order to prevent road accidents....for this i am using amplifier circuit and dsp kit speedy33...in order to filter eeg signal i need to design bandpass filter of 4-7Hz....but when i am design the response of filter is wrong because os sampling frequency ...that is 8000hz...i want to downsample the real time data of speedy33 kit.....how i downsample the 8000hz to 1000hz.............can anybody help me

[Henrik_Volkers]

downsampling: There is a downsampling vi , I would choose the mean option.

OR do it in old style : add 8 values up and shift 3 bit.

For the band filter: upper and lower freq of the passband AND the desiered cutoff need a specification.

What LV version plus Add on do you have?